| # ----------------------------------------------------------------------------- |
| # yacc_simple.py |
| # |
| # A simple, properly specifier grammar |
| # ----------------------------------------------------------------------------- |
| |
| from .calclex import tokens |
| from ply import yacc |
| |
| # Parsing rules |
| precedence = ( |
| ('left','PLUS','MINUS'), |
| ('left','TIMES','DIVIDE'), |
| ('right','UMINUS'), |
| ) |
| |
| # dictionary of names |
| names = { } |
| |
| from .statement import * |
| |
| from .expression import * |
| |
| def p_error(t): |
| print("Syntax error at '%s'" % t.value) |
| |
| import os.path |
| parser = yacc.yacc(outputdir=os.path.dirname(__file__)) |
| |
| |
| |
| |
| |
